# Relationship history for MSHA mine 3606954

Current hierarchy: **Michael  Scott → Stoudt's Ferry Preparation Company Inc → Mount Penn Preparation Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Allan  Yudacufski Et Al → Mount Penn Preparation Plant; 1950-01-01 to 2021-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Stoudt's Ferry Preparation Company Inc → Mount Penn Preparation Plant; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allan  Yudacufski Et Al → Stoudt's Ferry Preparation Company Inc; 1980-03-01 to 2021-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Steven D  Cotler Et Al → Stoudt's Ferry Preparation Company Inc; 1980-03-01 to 2021-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Scott → Mount Penn Preparation Plant; 2021-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Scott → Stoudt's Ferry Preparation Company Inc; 2021-04-01 to current/open; source msha-controller-operator-history